By adding the qualifier: "If you've been on the ride", it seems as if you are asking whether the ride is "good enough" to warrant a FP. But that is not the test. Efficient FP usage is about line avoidance. For the foreseeable future, the Mine Train will command a big line. So if you want to ride it, get a FP for it as many times as you think you will ride it. I might think that the Tea Cups is a better ride (just making an example here). But I would never get a FP for that because it would be an inefficient use of time.

Book two FP+ reservations for Mine Train: One during the day and one at night, it's a very different ride in the dark.
I second this. Night vs. day & front vs. back had a huge effect on ride experience (we rode it three times.)Book two FP+ reservations for Mine Train: One during the day and one at night, it's a very different ride in the dark.
I have not riden it. But I think I would book FP for it for both days. Then if you didn't like it, you can switch the second one to some thing else.
, didn't even think about that being an option.
I guess I will book a FP for the first day and also one for the last day and like you all said, we could change it if needed.